Skip to content
Agentmart
Submit a tool

Kastell

Server security audit (413 checks), hardening, and fleet management across 4 cloud providers.

Connector by kastelldev · GitHub account verified by the MCP Registry

IndexedApache-2.0Local (stdio)★ 60
Write a review

Install

Works with Claude Code, Codex, VS Code, Cursor, Windsurf, Claude Desktop. Read the repository before you give any tool access to your data.

npx agentmarket install connector/kastelldev-kastell

Asks which of your tools to add it to (Claude Code, Codex, Cursor, VS Code, Windsurf, Gemini CLI, Claude Desktop) and shows the change first. See https://agentmart.dev/cli.

Get the weekly diff

The weekly diff: one email a week with new agent tools, notable updates and grade changes, plus security alerts for tools you follow. Double opt-in, one-click unsubscribe.

We use your email only for this newsletter. Privacy

About

Server security audit (413 checks), hardening, and fleet management across 4 cloud providers.

Reviews

Write a review

No reviews yet. Installed it? Reviews come from verified installers only. How reviews work

Permissions

What this server can do and what it asks for, from its tool list and install config. Checked Oct 25, 2026.

Tools
8 read · 4 write · 5 delete
Secrets
4 (API keys, tokens or passwords)
Install scripts
Not scanned yet
Runs as
Node.js package

Tools by what they do 17

Read from the source code; the running server may list different tools.

Read 8 · Look things up without changing anything.

  • server_audit
  • server_compare
  • server_doctor
  • server_explain
  • server_fleet
  • server_info
  • server_logs
  • server_plugin

Write 4 · Create, change, send or run things.

  • server_evidence
  • server_guard
  • server_maintain
  • server_secure

Delete 5 · Delete, drop, revoke or wipe things.

  • server_backup
  • server_fix
  • server_lock
  • server_manage
  • server_provision

Secrets and settings it asks for

Secrets: values you paste in that let it act as you.

  • DIGITALOCEAN_TOKEN
  • HETZNER_TOKEN
  • LINODE_TOKEN
  • VULTR_TOKEN

Tools (17)

Read from the source code; the running server may differ. Descriptions are the server’s own words; hidden characters are shown as [U+…].

  • server_auditServer Security Auditread-only

    Description is built at runtime.

  • server_backupServer Backup & Snapshotscan change or delete data

    Backup and snapshot Kastell servers. Backup: 'backup-create' dumps Coolify DB + config via SSH (Coolify servers) or system config files (bare servers), 'backup-list' shows local backups, 'backup-restore' restores from backup — bare servers restore system config, Coolify servers restore DB+config (SAFE_MODE blocks restore). Snapshot: 'snapshot-create'/'snapshot-list'/'snapshot-delete' manage cloud provider snapshots (requires provider API token). Snapshots not available for manually added servers.

  • server_compareCompare Serversread-only

    Compare two servers side-by-side. Returns category-level score comparison (default) or check-level diff (detail mode). Uses cached snapshots when available, falls back to live SSH audit. Requires two registered servers.

  • server_doctorServer Doctorread-only

    Run proactive health analysis on a server. Detects disk trending full, high swap, stale packages, elevated fail2ban bans, audit regression streaks, old backups, and reclaimable Docker space. Uses cached metrics by default; pass fresh=true to fetch live data via SSH. Returns findings grouped by severity (critical/warning/info) with remediation commands. For a full scored security audit, use server_audit instead.

  • server_evidenceEvidence Collection

    Collect forensic evidence package from a server. Gathers firewall rules, auth.log, listening ports, system logs, and optionally Docker info. Writes to ~/.kastell/evidence/{server}/{date}/. Returns manifest with SHA256 checksums per file.

  • server_explainExplain Audit Checkread-only

    Deep-dive into a single audit check. Returns what it does, why it matters, how to fix it, fix tier (SAFE/GUARDED/FORBIDDEN), and compliance references (CIS/PCI-DSS/HIPAA). No SSH connection required. Supports case-insensitive and fuzzy matching for check IDs.

  • server_fixServer Safe Fixcan change or delete data

    Apply safe auto-fixes to a server. Runs audit, filters SAFE tier fixes, creates backup, applies fixes, and re-audits for score delta. dryRun defaults to true (preview only). SAFE_MODE forces preview. SSH/Firewall/Docker fixes are FORBIDDEN and always rejected. Use checks and category params to target specific fixes.

  • server_fleetFleet Visibilityread-only

    Get fleet-wide health and security posture for all registered servers. Returns server name, IP, provider, health status (ONLINE/DEGRADED/OFFLINE), cached audit score, and SSH response time. Use sort parameter to order results. For per-server cloud status or available server sizes, use server_info instead.

  • server_guardGuard Daemon

    Manage autonomous security monitoring daemon on a server. Actions: 'start' installs guard as remote cron (checks disk/RAM/CPU/audit every 5 min), 'stop' removes guard cron entry, 'status' shows whether guard is active with last check time and any threshold breaches. Requires SSH access to target server.

  • server_infoServer Informationread-only

    Get information about Kastell-managed servers. Actions: 'list' all servers, 'status' check cloud provider + Coolify/bare status, 'health' check Coolify reachability or SSH access for bare servers, 'sizes' list available server types with prices for a provider+region. Requires provider API tokens as environment variables (HETZNER_TOKEN, DIGITALOCEAN_TOKEN, VULTR_TOKEN, LINODE_TOKEN) for status/sizes checks. Avoid calling repeatedly in short intervals to prevent provider API rate limiting. For fleet-wide health and audit scores across all servers, use server_fleet instead.

  • server_lockServer Lockcan change or delete data

    Harden a server to production standard. Applies the production hardening sequence in a single SSH session covering SSH, fail2ban, UFW, sysctl, unattended-upgrades, Docker daemon, auditd, AIDE, and more. Requires production=true (safety gate). Pass dryRun=true to preview. Platform-aware: preserves Coolify/Dokploy ports. Shows audit score before and after. Requires SSH access. For fine-grained SSH/firewall/domain changes use server_secure instead.

  • server_logsServer Logs & Metricsread-only

    Fetch logs and system metrics from Kastell-managed servers via SSH. Actions: 'logs' retrieves recent log lines from Coolify container (Coolify servers only), Docker service, or system journal. Bare servers: use service 'system' or 'docker' (coolify service not available). 'monitor' fetches CPU, RAM, and disk usage metrics (works for all server modes). Requires SSH access to target server (root@ip). Note: live streaming (--follow) is not available via MCP — use the CLI for live log tailing.

  • server_maintainServer Maintenance

    Maintain Kastell servers. Actions: 'update' runs Coolify update via SSH (Coolify servers only — bare servers are blocked), 'restart' reboots server via cloud provider API (works for both Coolify and bare servers), 'maintain' runs full 5-step maintenance (Coolify servers only — bare servers are blocked). Snapshot not included — use server_backup tool. Requires SSH access for update, provider API tokens for restart/status. Manual servers: restart not available.

  • server_manageServer Managementcan change or delete data

    Manage Kastell servers. Actions: 'add' registers an existing Coolify or bare server to local config (validates API token, optionally verifies Coolify via SSH — pass mode:'bare' for servers without Coolify). 'remove' unregisters a server from local config only (cloud server keeps running). 'destroy' PERMANENTLY DELETES the server from the cloud provider and removes from local config. Requires provider API tokens as environment variables. Destroy is blocked when KASTELL_SAFE_MODE=true. Server mode for 'add' action: 'coolify', 'dokploy', or 'bare'. Default: coolify

  • server_pluginPlugin Managementread-only

    Manage kastell plugins. Actions: 'list' shows installed plugins with check counts and status, 'validate' checks manifest integrity and entry point validity. Install/remove not available via MCP — use CLI for security (requires explicit user consent). No SSH connection required.

Show 2 more tools
  • server_provisionServer Provisioningcan change or delete data

    Provision a new server on a cloud provider. Default: Coolify auto-install via cloud-init. Pass mode:'bare' for a generic VPS without Coolify (installs UFW and runs system updates only). Requires provider API token as environment variable (HETZNER_TOKEN, DIGITALOCEAN_TOKEN, VULTR_TOKEN, LINODE_TOKEN). WARNING: Creates a billable cloud resource. Blocked when KASTELL_SAFE_MODE=true. Server takes 3-5 minutes to fully initialize after provisioning.

  • server_secureServer Security

    Secure Kastell servers. Secure: 'secure-setup' applies SSH hardening + fail2ban, 'secure-audit' runs security audit with score. Firewall: 'firewall-setup' installs UFW with Coolify ports, 'firewall-add'/'firewall-remove' manage port rules, 'firewall-status' shows current rules. Domain: 'domain-set'/'domain-remove' manage custom domain with optional SSL, 'domain-check' verifies DNS, 'domain-info' shows current FQDN. All require SSH access to server. For full one-shot hardening (SSH + fail2ban + UFW + sysctl + unattended-upgrades), use server_lock instead.

Signals

Stars
60
Forks
2
Open issues
0
Contributors
5
Last commit
Jul 11, 2026 (3 months ago)
Last release
Jun 30, 2026 (4 months ago)

From GitHub (fetched Oct 24, 2026).

Details

Registry name
io.github.kastelldev/kastell
Version
1.14.0
Auth
API key
Packages
npm kastell
License
Apache-2.0
Repository
github.com/kastelldev/kastell
First seen
Oct 24, 2026
Last checked
Oct 24, 2026
Source
Official MCP Registrygithub-graphql
Cite this page

Kastell MCP server. Agent Mart. https://agentmart.dev/connectors/kastelldev-kastell (last updated 2026-10-24)